Enter T or F depending on whether the statement is true or false. Assume that matrices in the following statements are all square and of the same size.   1. If D1 and D2 are diagonal matrices, then D2D1=D1D2.   2. If L is a lower triangular matrix and D is a diagonal matrix, then LD=DL.   3. Every upper triangular matrix can be broken into the sum of a diagonal matrix and an upper triangular matrix that has all zeros on its diagonal.   4. If U1 and U2 are upper triangular matrices, then U2U1=U1U2.   5. Every invertible upper triangular matrix can be broken into the product of a diagonal matrix and an upper triangular matrix that has all ones on its diagonal.

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A: Let's find. 

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A: We can find the volume as below.

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A: To check first that A is invertible or not for A=231341343

Q: -4

A: For the solution of the parts follow the next steps.

Q: answer

A: Please refer to the image below

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A: NOTE: Refresh your page if you can't see any equations. . as we can see, the graph is symmetric abo...

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Q: What is the domain and range of this graph? :)

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A:

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A: Follow the procedure given below.

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